/*********************************************************************
 * Copyright (C) 2002 Andrew Khan
 * <p>
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * <p>
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * <p>
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 ***************************************************************************/

package jxl.write.biff;

import jxl.biff.IntegerHelper;
import jxl.biff.Type;
import jxl.biff.WritableRecordData;

/**
 * Contains the window attributes for a worksheet
 */
class PaneRecord extends WritableRecordData {
    /**
     * The number of rows visible in the top left pane
     */
    private int rowsVisible;
    /**
     * The number of columns visible in the top left pane
     */
    private int columnsVisible;

    /**
     * The pane codes
     */
    private final static int topLeftPane = 0x3;
    private final static int bottomLeftPane = 0x2;
    private final static int topRightPane = 0x1;
    private final static int bottomRightPane = 0x0;

    /**
     * Code

     /**
     * Constructor
     */
    public PaneRecord(int cols, int rows) {
        super(Type.PANE);

        rowsVisible = rows;
        columnsVisible = cols;
    }

    /**
     * Gets the binary data for output to file
     *
     * @return the binary data
     */
    public byte[] getData() {
        byte[] data = new byte[10];

        // The x position
        IntegerHelper.getTwoBytes(columnsVisible, data, 0);

        // The y position
        IntegerHelper.getTwoBytes(rowsVisible, data, 2);

        // The top row visible in the bottom pane
        if (rowsVisible > 0) {
            IntegerHelper.getTwoBytes(rowsVisible, data, 4);
        }

        // The left most column visible in the right pane
        if (columnsVisible > 0) {
            IntegerHelper.getTwoBytes(columnsVisible, data, 6);
        }

        // The active pane
        int activePane = topLeftPane;

        if (rowsVisible > 0 && columnsVisible == 0) {
            activePane = bottomLeftPane;
        } else if (rowsVisible == 0 && columnsVisible > 0) {
            activePane = topRightPane;
        } else if (rowsVisible > 0 && columnsVisible > 0) {
            activePane = bottomRightPane;
        }
        // always present
        IntegerHelper.getTwoBytes(activePane, data, 8);

        return data;
    }
}
